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Will the EFI pump move enough air through it to disturb
the fuel rail pressure that's being delivered from the other pump,
I would say yes
I'd bet that you have a 50-50
chance of being right :-) Seriously, I'm not so sure it would pump
air well enough to overcome the 43 psi of pressure that the other pump is
putting in the rail. I guess the only way to find out it to do the
experiment. I'm not completely sure that's what I want to do anyway.
Yep, still trying
to figure out how to fix my fuel transfer system.
What's it look like
now?
Remember the recent caution about copying a system
100%, or it becomes a new system? Well, guilty as charged. My system
is just like Tracy's, except that I only have one return line to my feed
tank. I plumbed the wimpy facet transfer pump into the same
line that returns from the regulator. That means the facet pump is trying
to push against the return flow from the regulator, and it's not doing too
well.
Even at
it's best, on the ground, with no other pumps on, the facet is slow. In
the air, fighting against one EFI pump's return flow, it takes a long long time
to see fuel moving. With both EFI pumps on, I almost wonder if fuel isn't
going backwards into the non-feed tank anytime the facet wasn't on because the
check ball isn't perfect. I added a one way valve to stop this, and
to stop the fuel from leveling itself between tanks when parked.
The
obvious solution is to "simply" (NOT) add another hose to the feed
tank. Even if I go through all that hassle, I'm still stuck with the
slow rate of transfer of the facet. It's probably still the best
option, but I'm going to investigate every other option before doing this.
Rusty
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